EP0010254B1 - Procédé de production d'énergie électrique dans un système à vapeur à contre-pression - Google Patents

Procédé de production d'énergie électrique dans un système à vapeur à contre-pression Download PDF

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Publication number
EP0010254B1
EP0010254B1 EP79103882A EP79103882A EP0010254B1 EP 0010254 B1 EP0010254 B1 EP 0010254B1 EP 79103882 A EP79103882 A EP 79103882A EP 79103882 A EP79103882 A EP 79103882A EP 0010254 B1 EP0010254 B1 EP 0010254B1
Authority
EP
European Patent Office
Prior art keywords
steam
heat
pressure
expanded
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79103882A
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German (de)
English (en)
Other versions
EP0010254A1 (fr
Inventor
Anton Pocrnja
Alfred Bolkart
Josef Dworschak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
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Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of EP0010254A1 publication Critical patent/EP0010254A1/fr
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Publication of EP0010254B1 publication Critical patent/EP0010254B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic

Definitions

  • the invention relates to a method for obtaining electrical energy in a counter-pressure steam system, in which water vapor is expanded while performing work.
  • counter-pressure steam systems are power plants which serve to cover the power and heat requirements at the same time and which allow the fuel heat to be fully utilized.
  • the steam of high pressure and high temperature generated in a steam boiler first serves to drive a high-pressure turbine, in which the steam is expanded to a required temperature or a required pressure level in a first steam rail.
  • steam can be drawn off from this steam rail both to cover the heat requirement of the system and can be expanded in a turbine into another steam rail with a lower pressure level.
  • the invention is therefore based on the object of developing a method with which the power-heat ratio can be increased in a gas pressure steam system of the type described.
  • This object is achieved in that steam of one of the existing pressure levels before said work-relieving relaxation is heated first isobarically by heat exchange with the relaxed steam and then with external heat and isobarically cooled to one of the existing lower pressure levels after said relaxation .
  • the steam is initially recuperative according to the invention by heat from the relaxed steam and then with external heat, e.g. B. in a fuel-fired heater, reheated and only then, optionally in several stages, relaxed.
  • the steam can be subjected to any of the available pressure levels in these process steps. In this way, the proportion of the mechanical energy generated in the turbines and thus the power-heat ratio is increased.
  • the utilization of primary energy for the provision of external heat is far superior to the previous additional electricity generation. Due to the recuperative heating, the steam is raised to a relatively high temperature level, so that the external heat that is subsequently supplied to the steam is optimally used. H.
  • recuperative heating is to be seen in the fact that with increasing temperature of the heat source, by which the external heat is provided, the temperature of the steam supplied to the heat source also increases, and thus the heat of the heat source is optimally used in all temperature ranges. With an ideal gas and with any small temperature differences during recuperative heat exchange, the turbine output would be the same as the external heat absorbed.
  • the additional energy of the method according to the invention is therefore generated with a much better efficiency than, for example, the energy provided by a pure force process.
  • the relaxed steam after the isobaric cooling still has a higher heat content than e.g. B. the steam expanded by a conventional method only in a turbine. Therefore, according to an advantageous embodiment of the inventive concept, this excess heat can be used to heat a heat consumer.
  • the working medium to be heated can serve as a heat consumer in an additional power process.
  • the steam throughput of the back pressure steam system can be reduced.
  • the method according to the invention enables the increase in the power-heat ratio within the counter-pressure operation with a much better efficiency than in conventional methods.
  • the high efficiency is due to the higher specific energy generation corresponding to the higher temperature level of the steam before the expansion or to the reduction of the required external heat. If condensation turbines are used in a system that works according to the proposed method, the amount of cooling water is also reduced in comparison to conventional systems with condensation turbines, since the amount of steam for the condensation turbines can be reduced as a result of the increased power-heat ratio of the counter-pressure operation.
  • the steam of the back pressure steam system shown is generated in an evaporator 1, in a high pressure turbine 2 to a pressure of z. B. 39.2 - 10 5 N / m z relaxed and fed at a temperature of 642 K in the medium pressure steam rail.
  • the steam from this rail insofar as it was not consumed by heat consumers 11, was expanded directly into the low-pressure steam rail 16 via a turbine.
  • the steam is first heated essentially isobarically.
  • a recuperator 3 is used, in which part of the steam of the medium-pressure steam rail is heated to a temperature of 770 K, and a fuel-fired heater 4, in which the steam temperature is raised to 993 K.
  • the steam of this high temperature levels is in a load connected to the heater turbine 5 to the pressure of the rail 16 with, for example 9.8 - initiated 10 5 N / m 2 relaxed and isobaric cooling in heat exchange with Anlagenangendem vapor via line 8 into the recuperator 3 .
  • the temperature of the steam emerging from the turbine at 791 K drops to 653 K in recuperator 3.
  • This steam has a higher heat content than the conventional solution. This excess heat is dissipated in the exemplary embodiment shown in the heat exchange with feed water for the evaporator 1.
  • the recuperator 3 is connected to a heat exchanger 6, from which the steam emerges at 494 K and enters the low-pressure steam rail 16.
  • the feed water is fed to the heat exchanger 6 via a line 14, which branches off from the line 17 for the condensate recirculation, and is then fed back into line 17.
  • the steam of the low-pressure steam rail 16 is fed to low-pressure process steam consumers 10 and condensed.
  • a number of pumps 12, 13 corresponding to the number of steam rails increases the pressure of the condensate and supplies the steam boiler 1 with feed water.
  • the following table 1 shows the temperature, pressure, specific enthalpy and specific entropy of the steam for the exemplary embodiment described at the points designated by letters a to f in the sketch.
  • Table 2 shows the specific consumption figures and outputs of the process example shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Turbines (AREA)

Claims (3)

1. Procédé de production d'énergie électrique dans un système à vapeur à contre-pression, dans lequel de la vapeur d'eau est soumise à une détente avec fourniture de travail, caractérisé en ce que, avant ladite détente avec fourniture de travail, la vapeur présentant une des valeurs de pression existantes (15) est réchauffée de manière sensiblement isobare par échange thermique, d'abord avec la vapeur détendue (3), et ensuite avec de la chaleur extérieure (4), et en ce qu'après ladite détente, cette vapeur est refroidie (3, 6) de manière sensiblement isobare à une des pressions existantes, inférieures à la valeur existante précitée.
2. Procédé selon la revendication 1, caractérisé en ce que la vapeur détendue et refroidie de manière isobare est refroidie davantage (6), par un récupérateur de chaleur, à la température de la vapeur présentant une pression de valeur existante inférieure.
3. Procédé selon la revendication 2, caractérisé en ce que la vapeur détendue et refroidie de manière isobare est refroidie davantage (6) par l'eau d'alimentation d'un système à vapeur.
EP79103882A 1978-10-13 1979-10-10 Procédé de production d'énergie électrique dans un système à vapeur à contre-pression Expired EP0010254B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2844742 1978-10-13
DE19782844742 DE2844742A1 (de) 1978-10-13 1978-10-13 Verfahren zur gewinnung von elektrischer energie in einem gegendruckdampfsystem

Publications (2)

Publication Number Publication Date
EP0010254A1 EP0010254A1 (fr) 1980-04-30
EP0010254B1 true EP0010254B1 (fr) 1981-11-04

Family

ID=6052160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103882A Expired EP0010254B1 (fr) 1978-10-13 1979-10-10 Procédé de production d'énergie électrique dans un système à vapeur à contre-pression

Country Status (6)

Country Link
US (1) US4328675A (fr)
EP (1) EP0010254B1 (fr)
JP (1) JPS5591708A (fr)
AT (1) AT378038B (fr)
CA (1) CA1150955A (fr)
DE (2) DE2844742A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5622605A (en) * 1993-11-05 1997-04-22 Simpson; Gary D. Process for desalinating water while producing power
JP3315800B2 (ja) * 1994-02-22 2002-08-19 株式会社日立製作所 蒸気タービン発電プラント及び蒸気タービン
JP4486391B2 (ja) * 2004-03-30 2010-06-23 株式会社神戸製鋼所 余剰蒸気の有効利用装置
USRE46316E1 (en) * 2007-04-17 2017-02-21 Ormat Technologies, Inc. Multi-level organic rankine cycle power system
US8438849B2 (en) * 2007-04-17 2013-05-14 Ormat Technologies, Inc. Multi-level organic rankine cycle power system
EP2290200A1 (fr) * 2009-07-15 2011-03-02 Siemens Aktiengesellschaft Installation de centrale à vapeur dotée d'une unité de turbine à vapeur et récepteur de vapeur de traitement ainsi que procédé de fonctionnement d'une installation de centrale à vapeur dotée d'une unité de turbine à vapeur et récepteur de vapeur de traitement
US20110271676A1 (en) * 2010-05-04 2011-11-10 Solartrec, Inc. Heat engine with cascaded cycles
US8789371B2 (en) * 2011-01-03 2014-07-29 General Electric Company Power generation apparatus
CN104329127B (zh) * 2014-11-10 2016-03-30 中国电力工程顾问集团华东电力设计院有限公司 多机组联合扩容系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732009A (en) * 1927-11-03 1929-10-15 W S Garstow & Company Method and apparatus for development of power
DE884802C (de) * 1944-08-03 1953-07-30 Rudolf Dipl-Ing Hingst Dampfkraftanlage mit Zwischenueberhitzung
US2643519A (en) * 1949-03-02 1953-06-30 Richard C Powell Regenerative steam power plant in which an extraction turbine supplies steam to desuperheaters which serve to heat feed water
DE1004203B (de) * 1954-02-06 1957-03-14 Siemens Ag Heizkraftwerk mit Gegendruckturbine
US3376706A (en) * 1965-06-28 1968-04-09 Angelino Gianfranco Method for obtaining mechanical energy from a thermal gas cycle with liquid phase compression
US3391539A (en) * 1967-08-16 1968-07-09 Gen Electric Pressure control and flow dispatching system for steam turbine powerplant
US4178761A (en) * 1977-06-17 1979-12-18 Schwartzman Everett H Heat source and heat sink pumping system and method
US4249384A (en) * 1978-08-03 1981-02-10 Harris Marion K Isothermal compression-regenerative method for operating vapor cycle heat engine
US4214451A (en) * 1978-11-13 1980-07-29 Systems Control, Inc. Energy cogeneration system

Also Published As

Publication number Publication date
AT378038B (de) 1985-06-10
US4328675A (en) 1982-05-11
DE2844742A1 (de) 1980-04-24
CA1150955A (fr) 1983-08-02
DE2961270D1 (en) 1982-01-14
ATA156579A (de) 1984-10-15
EP0010254A1 (fr) 1980-04-30
JPS5591708A (en) 1980-07-11

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